Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while placing
led over connections, LED can only light up at one way connection
position....

--
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The Fug.

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Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.

GSV Three Minds in a Can wrote:

Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

Graham

Bitstring , from the wonderful person
Eeyore said


GSV Three Minds in a Can wrote:

Bitstring , from the
wonderful person TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.

GSV Three Minds in a Can wrote:

Eeyore said
GSV Three Minds in a Can wrote:
TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

NO

Bitstring , from the wonderful person
Eeyore said


GSV Three Minds in a Can wrote:

Eeyore said
GSV Three Minds in a Can wrote:
TheFug said
Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?
(I have some cable extensions to do on the speakers that came with
my new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while
placing led over connections, LED can only light up at one way
connection position....

That makes the rash (especially with cheap speakers) assumption that the
speaker connections are hooked up to the internals the same way in both
cases. Much safer to actually test the sound output (or, as someone
said, to see which way the cone moves with a DC source).

Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

NO

Sure it can. You just need something around 0.1hz.

--
GSV Three Minds in a Can
11,517 Km walked. 2,259 Km PROWs surveyed. 40.9% complete.

"GSV Three Minds in a Can" wrote in message
...

Sure it can. You just need something around 0.1hz.

You won't get 0.1Hz through an audio amplifier!

David.

"Eeyore" wrote in message
...


GSV Three Minds in a Can wrote:


Audio is AC you blithering loonies. No way can an LED inducate
polarity/phase.

It can if you play REALLY low frequency music. 8.

NO

Oh I dunno. If you use a very low frequency tone (NOT music), say 10Hz, and
connect an LED across each speaker (not forgetting a suitable series
resistor to avoid the risk of damaging the amplifier), and being absolutely
sure that both LEDs are connected the same way round (not always easy) and
by placing the two LEDs next to each other you might, just might, be able to
see if they are flikering in phase, or out of phase.

As a way of determining speaker phase it has the problems of being difficult
and cumbersome to do and uncertain in it's outcome, but it's not utterly
impossible. But since determining speaker phase is so easy to do using ones
ears there seems little point to the LED method, though it might be of use
to the stone deaf.

:-)

David.

In article ,
David Looser wrote:
Oh I dunno. If you use a very low frequency tone (NOT music), say 10Hz,
and connect an LED across each speaker (not forgetting a suitable
series resistor to avoid the risk of damaging the amplifier), and being
absolutely sure that both LEDs are connected the same way round (not
always easy) and by placing the two LEDs next to each other you might,
just might, be able to see if they are flikering in phase, or out of
phase.

LEDs can fail with reverse polarity.

--
*Work like you don't need the money. Love like you've never been hurt.

Dave Plowman London SW
To e-mail, change noise into sound.

TheFug wrote:

Terry Pinnell schreef:
Could someone remind me of the simple test involving placing 'left'
and 'right' speakers close together facing each other please? Am I
right in recalling that they are in correct 'phase' when the volume
sounds reduced/muffled? Or is it the reverse?

(I have some cable extensions to do on the speakers that came with my
new PC, and both wires are identical, so I want to be sure I get it
right.)


use a Light Emitting Diode LED play music at low level, while placing
led over connections, LED can only light up at one way connection
position....

Just how big an idiot are you ?

Graham